• Title, Summary, Keyword: 비콘

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Multi-Channel Time Division Scheduling for Beacon Frame Collision Avoidance in Cluster-tree Wireless Sensor Networks (클러스트-트리 무선센서네트워크에서 비콘 프레임 충돌 회피를 위한 멀티채널 시분할 스케줄링)

  • Kim, Dongwon
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.17 no.3
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    • pp.107-114
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    • 2017
  • In beacon-enabled mode, beacon collision is a significant problem for the scalability of cluster-tree wireless sensor networks. In this paper, multi-channel time division scheduling (MCTS) is proposed to prevent beacon collisions and provide scalability. A coordinator broadcasts a beacon frame, including information on allocated channels and time-slots, and a new node determines its own channel and time-slot. The performance of the proposed method is evaluated by comparing the proposed approach with a typical ZigBee. MCTS prevents beacon collisions in cluster-tree wireless sensor networks. It enables large-scale wireless sensor networks based on a cluster tree to be scalable and effectively constructed.

Transmission Control Scheme for Low Power Stations in IEEE 802.11b Wireless LAN (IEEE 802.11b 무선 랜에서 저 전력 스테이션을 위한 전송 제어 기법)

  • Song, Myong-Lyol
    • Journal of Internet Computing and Services
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    • v.9 no.2
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    • pp.43-50
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    • 2008
  • In IEEE 802.11b wireless LAN, stations keep synchronization by receiving beacons being periodically sent by the AP (access point) when they run in low power mode. Beacon transmission is delayed if wireless channel is busy at a scheduled TBTT (target beacon transmission time), and stations must be awake until they receive the delayed beacon. In this paper, we propose a scheme that stations get their transmission delayed if they have little time for successful data transmission by the next TBTT. Beacon transmission without delay is guaranteed at every TBTT with this method so that the awake time of low power stations to receive beacon can be reduced. The proposed method is simulated and its characteristics ore described with the analysis of the results. The measured results in terms of beacon delay show some enhancement in energy consumption.

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Performance Improvement of IP Handover by Data Link Trigger (데이터링크 트리거에 의한 IP 핸드오버 성능 개선)

  • Ki, Jang-Geun;Lee, Kyu-Tae
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.16 no.1
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    • pp.55-60
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    • 2016
  • In the traditional wireless LAN model, scan procedure to search a new AP starts when the predefined number of Rx failure of beacon frames are occurred. In this case, lots of data packet loss occur during MN's handover because loss of the relatively longer data packet starts before the small-sized beacon loss. Newly developed scanning mechanism in this paper has the beacon counter that increases when the Rx power level of beacon frame is less than the threshold and the previous rx power level. New scan procedure starts when the counter exceeds the predefined number. Beacon Rx power threshold is verified and performance of the new WLAN model is evaluated under UDP and TCP traffic environment.

Low-Latency Beacon Scheduling Algorithms for Vehicular Safety Communications (차량간 안전 통신에서 짧은 지연시간을 보장하는 비콘 스케줄링 알고리즘)

  • Baek, Song-Nam;Jung, Jae-Il;Oh, Hyun-Seo;Lee, Joo-Yong
    • Journal of the Korea Society for Simulation
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    • v.20 no.1
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    • pp.19-28
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    • 2011
  • The safety applications based on the IEEE 802.11p, periodically transmit the safety-related information to all surrounding vehicles with high reliability and a strict timeline. However, due to the high vehicle mobility, dynamic network topology and limited network resource, the fixed beacon scheduling scheme excess delay and packet loss due to the channel contention and network congestion. With this motivation, we propose a novel beacon scheduling algorithm referred to as spatial-aware(SA) beacon scheduling based on the spatial context information, dynamically rescheduling the beaconing rate like a TDMA channel access scheme. The proposed SA beacon scheduling algorithm was evaluated using different highway traffic scenarios with both a realistic channel model and 802.11p model in our simulation. The simulation results showed that the performance of our proposed algorithm was better than the fixed scheduling in terms of throughput, channel access delay, and channel load. Also, our proposed algorithm is satisfy the requirements of vehicular safety application.

A Study of Dementia Patient Care Monitoring System Based on Indoor Location Using Bluetooth Beacon (블루투스 비콘을 활용한 실내위치기반 치매환자 모니터링 시스템에 관한 연구)

  • Kwon, Dae-Won
    • Journal of Digital Convergence
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    • v.14 no.2
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    • pp.217-225
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    • 2016
  • In this study, a dementia patient care monitoring system is suggested that uses a wearable type bluetooth beacon to prevent them from going missing. This system shows whether the patients stay within the manageable area and sends a warning message to their monitoring managers' or guardians' smart devices when they leave it. The feature of the system is that it provides the service based on indoor location that makes the beacon worn by dementia patients continuously transmit their location information to the managing server through the smart terminal installed indoors or in hospitals and that enables the monitoring managers or the guardians to receive messages sent from the server that tell the patients' whereabouts through their smart devices. The system suggested in this paper is believed to be a system that effectively contributes to the prevention of the dementia patients' going astray from the hospitals and facilities where they are taking care.

BLE Beacon Based Online Offline Tourism and Solutions for Regional Tourism Activation (지역관광 활성화를 위한 비콘 기반의 온오프라인 관광 솔루션)

  • Ryu, Gab-Sang
    • Journal of The Korea Internet of Things Society
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    • v.2 no.2
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    • pp.21-26
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    • 2016
  • In this paper, it is possible to update the tourist information in real time, on/off-line tour proposes a solution(BBTS) based on a bluetooth beacon can provide tourist information without the need for wireless data network. BBTS consists of a bluetooth based data of the low-power supply system and the beacons and interoperable smart applications. Data supply system consists of the BLE & Beacon Pairing-based / non-pairing data transmission module with integral hardware. Smart application modules that provide indoor location of users information, internal server module and tourist information collection and information guide around comprised of applications. The proposed BBTS is possible that indoor service tourism tourist demand due to utilizing the beacon technology. Outdoor tourist information is designed to be downloaded to the smartphone receives the information received from the beacon APK file to provide services. BBTS system is expected to make a big impact on the smart tourism services industry.

Analysis of Features and Applications of Bluetooth Beacon Technology for Utilization in the Mining and Construction Industries (블루투스 비콘 기술의 광업 및 건설 분야 활용을 위한 특징과 적용사례 분석)

  • Jung, Jihoo;Baek, Jieun;Choi, Yosoon
    • Tunnel and Underground Space
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    • v.26 no.3
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    • pp.143-153
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    • 2016
  • This study analyzed the features and various applications of Bluetooth beacon technology for utilization in the mining and construction industries. Through a literature survey, the concept and version-specific features of Bluetooth were reviewed, and representative types of the Bluetooth beacon-based service and its real-world applications in other fields were analyzed. Although a few previous studies that used the Bluetooth Classic (the old version of Bluetooth technology) in the mining industry have been reported, no mine site could be found where the Bluetooth beacon technology was utilized. In the construction industry, this study could find a site where the Bluetooth beacon technology was used to improve the haulage works of construction raw materials. Since the Bluetooth beacon technology has low power consumption and is easy to integrate with smartphones, it will be effectively utilized to improve the productivity and safety in the mining and construction industries.

Transmission Control Method of Beacon Signal Based on Bluetooth of Lower Electric Power (저 전력 블루투스 기반 비콘 신호 전송 제어 방법)

  • Oh, Am-suk
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.20 no.6
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    • pp.1136-1141
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    • 2016
  • IoT technology has been used as a core technology of convergence service that needs intelligent information processing, and the importance is largely emerging now. And internal network construction thru IoT interaction device can connect with IoT device effectively, provide diverse services by connection with open platform. Especially, beacon that is based on low electric power bluetooth device is receiving attention as one of core technology of IoT. Beacon technology is utilized widly in various fields of industry, and there are lot of demands in the specific environment and conditions beyond the basic function. On this thesis, the authors are proposing the beacon device that utilized acceleration sensor and hole sensor. this beacon device can control the target on specific situation thru sensing of moving target. For the more, we will expect to apply to the various type of factory environments like detachable installation, optimized management using sensor.

A Design and Implementation of Product Information Guide System Based on Beacon

  • Lee, Won Joo;Yoo, Jung Hyun;Lee, Kang-Ho;Jang, Eun-Gyeom
    • Journal of the Korea Society of Computer and Information
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    • v.25 no.12
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    • pp.119-126
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    • 2020
  • In this paper, we design and implement a product information guidance system Based on BLE beacons. This system is designed to provide various functions such as contactless entrance service through mobile ticket, seat guidance service, event push service, content push service, and public service. This system consists of three modules: a beacon recognition module, a server linkage module, and a content transmission module. The beacon recognition module implements a function of transmitting a specific ID of a nearby beacon when a customer with a smartphone approaches the available service area. The server linkage module recognizes the beacon ID value, transfers it to the server, and implements the function to check the location of the server having the ID. The content transmission module implements a function of transmitting event or service information set at a corresponding location to a smartphone. The beacon-based product information guidance system implemented in this paper has the advantage of being able to quickly and easily implement various product information guidance systems.

Implementation of Location-Based Smart Campus and Class Guide System Using Beacon (비콘을 이용한 위치 기반의 스마트 학교 및 수업 안내 시스템 구현)

  • Kim, Myung-Ah;Kim, Da-Sol;Hwang, Ji-Yeon;Chang, Byeong-Mo
    • The Journal of the Korea Contents Association
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    • v.18 no.2
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    • pp.419-426
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    • 2018
  • Recently, indoor locating using beacon has gained much attention as an indoor locating technology. This technology has been used for various indoor LBS(location-based services). However, there is a lack of research on LBS service specialized in university yet. In this paper, we designed and implemented a smart LBS system using beacon for campus and class guide in the university. This system provides for campus and class guide services based on the current specific location in the campus, This system can be improved as more precise becon technology is developed.